The centers of a 10 kg lead ball and a 60 g lead ball are separated by 15cm. part a what gravitational force does each exert on the other? express your answer in newtons.

Explanation:

The magnitude of the gravitational force between two objects is given by

where

is the gravitational constant

m1, m2 are the masses of the two objects

r is the separation between them

For the balls in this problem,

Substituting into the equation, we find the gravitational force that each ball exerts on the other:

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.